1 files changed, 1 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js
index c822a8e7..3fcfe2d2 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2009,7 +2009,7 @@ merge(Compressor.prototype, {
                     };
                     var tw = new TreeWalker(function(node) {
                         if (!arg) return true;
-                        if (has_await(node)) {
+                        if (has_await(node) || node instanceof AST_Yield) {
                             arg = null;
                             return true;
                         }